If God always sends reformers, why is humanity abandoned in the end?

God abandons no one while a goal has not yet been reached. Only when a message has reached its peak and people then turn away from it again does He leave them to themselves, and in the end this applies to the whole of mankind.

It is true that God does not abandon people when they go astray. The history of the prophets shows this again and again. But all guidance has a goal. God sends His messengers so that a people or a religion may reach a certain stage. As long as that goal still lies ahead of them, He keeps sending new help.

Once the goal has been reached, however, things change. Whatever has reached its peak and then declines again is given up. That is what happened to earlier religions. They reached their completion, and when people later strayed again, they were left to themselves. God then began something new with a new message.

Today it is no longer about a single people or country but about the whole of mankind. Islam addresses all people, and its completion comes in two steps. First came the Holy Prophet Muhammad (saw). After him the Messiah was to come in his service, in whose time mankind as a whole is to find its way to Islam. The last two verses above point to this.

When mankind has reached this summit and then turns away again, the same rule applies to it that once applied to individual peoples. There is then no higher message left to come. So God does not abandon people arbitrarily. They first abandon what they have received. The first verse above describes exactly this rule.